problem Is the signal of SMS the same as Bluetooth or infrared?

The so-called Bluetooth technology is actually a short-range radio technology. Bluetooth technology can effectively simplify the communication between mobile communication terminal devices such as palmtop computers, notebook computers and mobile phones, and can also successfully simplify the communication between these devices and the Internet, thus making the data transmission between these modern communication devices and the Internet faster and more efficient, and broadening the road for wireless communication. Bluetooth adopts distributed network structure, fast frequency hopping and short packet technology, supports point-to-point and point-to-multipoint communication, and works in the global 2.4GHz ISM (industrial, scientific and medical) frequency band. Its data rate is 1Mbps. Time division duplex transmission scheme is adopted to realize full duplex transmission.

Source of Bluetooth name

The name Bluetooth comes from Danish King Harald Blatand in the 10 century, and his English meaning can be interpreted as Bluetooth.

The so-called infrared ray refers to electromagnetic radiation whose wavelength exceeds red visible light. Pocketpc can exchange information with desktop and other related devices with infrared function.

Mobile phone infrared can be wirelessly connected to computers or other mobile phones, provided that both parties have infrared. When using, the phone needs to turn on the infrared function! Close to the infrared port of the computer, the computer will automatically search for signals. If successful, the sign of infrared connection will appear on the system tray. Then you can send the data to the mobile phone (the format supported by the mobile phone)

However, the infrared power consumption of mobile phones is very large, far exceeding Bluetooth. Driving time is too long, which greatly affects the life of infrared rays and batteries.

Infrared data traffic is very small, laptops use infrared to surf the Internet, and mobile phones are basically running at full speed, which will definitely affect their service life.

Infrared technology is also a wireless communication mode, which can transmit wireless data. Compared with Bluetooth, infrared transmission should not be too far away, and it should be aimed at the direction without obstacles in the middle. At present, infrared technology is mainly used for short-distance point-to-point linear data transmission with high transmission rate. For example, if you want to send a picture or a ringtone to a friend, you only need to send the selected file in infrared mode, and then aim at the infrared data correlation of two mobile phones, and you can send it quickly. Of course, it doesn't cost information to send files by infrared rays, but the two sides of the transmission must be very close, usually about one meter.

The most widely used infrared technology of mobile phone is the data exchange between mobile phone and computer and other digital devices. With infrared technology, these seemingly complicated data transmission becomes very simple. First, we must prepare an infrared adapter. If we want to download the files from the computer to the mobile phone, we also need a computer and a mobile phone with infrared function. Select the file to be transmitted in the computer, send it to the designated device, and then aim the infrared adapter at the infrared data association of the mobile phone for data transmission. Many mobile phone manufacturers have integrated it into their mobile phones, giving users greater freedom in choosing wireless data transmission. With the maturity of wireless data transmission technology, it is believed that mobile phones and personal consumer digital products will have more mature and stable wireless transmission technology applications.